These files are all .ZIP files and are quite large in size. It may take a few minutes to download, depending on your internet speed. Each download zip file contains reference documents explaining the fields contained within the files. All GIS Data is provided in shapefile format.
You will need WinZip or
PKZip to unzip the files
before use. You will also need special GIS software to use the data.
A number of products are available including:

Other
products may also be available from other vendors which may be suitable for
your use.

DISCLAIMER:These
products are for informational purposes and may not have been prepared for or be
suitable for legal, engineering, or surveying purposes. It does not represent an
on-the-ground survey and represents only the approximate relative location of
property boundaries.

UPDATE: Please read the documentation included with the download as it has
recently changed.